Level stock



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E. A. SCHADE LEVEL'STOCK Filed Aug. 24'. 1922 Patented May 6, 1924.

UNITED STATES PATENT OFFICE.

EDMUND A. SCHADE, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE STANLEY IWORKS, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

LEVEL STOCK.

Application filed August 24, 1922. Serial No. 583,968.

To all whom it may concern.

Be it known that I, EDMUND A. SoI-IADE, a citizen of the United States,and a resident of New Britain, county of Hartford, State of Connecticut,have invented certain new and useful Improvements in Level Stocks, ofwhich the following is a specification.

This invention relates to metallic level stocks of the type having apair of flat straight edge portions connected by a web and with theirworking faces in parallelism with each other.

The aim of the invention is to provide a level stock of this sort whichis simple in construction, light in weight, and wherein the workingfaces are reinforced and braced in such manner that they are maintainedperfectly level and true under all conditions of use and should anyundue stress or strain be applied to them.

In the accompanying drawing wherein I have shown for illustrativepurposes the preferred embodiment which the invention may take;

Figure 1 is a side view of my improved level stock;

Fig. 2 is a transverse sectional view .taken substantially on line 22 ofFig. 1; and

Fig. 3 is a view similar to Fig. 1, but showing the stock provided withspirit tubes.

Referring to the drawing in detail, it will be seen that my improvedlevel stock comprises a single or integral casting preferably ofaluminum, having a pair of flat straight edges 10 and 11, connectedtogether by a web of novel and advantageous construction. The workingfaces, 12 and 13, respectively of the straight edges 10 and 11 aresuitably milled or otherwise machined to make them perfectly true and inparallelism with each other.

The web which preferably connects the straight edge portions 10 and 11along their longitudinal median lines has the openings 14 and 15 andprovides a pair of flanges, 16, 17, one for each straight edge portion,these flanges being of greatest width at their centers and graduallysloping down towards the ends of the level stock. flanges are of suchtapered construction or shape that they reinforce and brace the straightedges and maintain the same perfectly level and true altho unduestresses or strains are applied to them. The flanges, 16 and 17, areconnected together at their center as at 18, and at their ends as at 19.

The level stock shown in Fig. 3 is similar to that shown in thepreceding figures except that it is provided with spirit tubes, 20,these tubes, in the present illustrative disclosure, being positioned insuitable annulus adjacent to the center of the web and approximatelymidway between the center and the ends of the level stock.

It will be seen that with the construction described, since each of theflanges is of tapered construction, being of greatest width at theircentral portions, the maximum strength is obtained with a minimum amountof metal. This means that the level stock may be more economicallymanufactured and is light of weight while at the sametime it possessesgreat strength and rigidity enabling it to'be used in cases where it issubjected to excessive strains or stresses.

I claim as my invention:

1. A level stock of the character described having a pair of straightparallelly arranged edge portions each reinforced by a longitudinallyextending flange tapering down from its center towards its ends, saidflanges being integrally attached at their centers and ends.

2. A level stock formed of a single piece of metal and having a pair offlat straight edge portions in parallelism with each other and a webcomposed of a pair of flanges integrally attached at their centers andends, said flanges extending along the median lines of said straightedge portions and being of greatest width adjacent their centers andtapering down towards their ends.

EDMUND A. SCHADE.

Thus, these i

